Ventilation control for vehicles



J- C. BACKE VENTILATION CONTROL FOR VEHICLES 7 April 6, 1954 Filed June 15 1951 INVENTOR' e]. 616a eke ATTORNEY5 Ara/la! Ill/J I. III/ff Patented Apr. 6, 1954 UNITED STATES VENTILATION coNTROL noavnnroms Johu flliBacke, Gaylord, Mich. v

Application June '15, 1951, Serial No. 231,851

3 Claims. 1

This'i-nvention relates to a ventilating system or motor vehicles, and comprises a continuationin-part of my copending application Serial No. 89,525, filed April 25, 1949, now Patent Number 2,604,837.

A primary object of this invention is the provision of an improved and simplified ventilating system for supplying fresh air to a motor vehicle.

An additional object of this invention is the provision of a device of this character whereby air may be supplied to and returned from a vehicle through the same duct. 7

Still another object of the invention is the provision of a device of this character whereby suction means are provided to insure ventilation even when the vehicle is stationary.

Other objects will in part be obvious and in part be pointed out as the description of the invention proceeds, and shown in the accompanying drawing, wherein there are disclosed pre- 1 ferred embodiments of this inventive concept.

In the drawing:

Fig. 1 is a fragmentary longitudinal sectional view of one form of device embodying the instant invention; and

Fig. 2 is a similar view of a modified form of construction.

Referring now to the drawing, and more particularly to Fig. 1, there is generally indicated at Ill an air scoop adapted to be positioned beneath the hood of a motor vehicle adjacent the forward end thereof to insure the admission of fresh air. Extending from the air scoop I is a tubular member [I which extends to the interior of the vehicle in any desired location, and which is provided with any suitable valve means 12 adapted to be controlled as by a control rod 13 from the interior of the vehicle.

Diverging from the air scoop l0 and coplanar with the tube II is an outlet I4, while a suitable pair of separate spring loaded valves [5 and it are both mounted on a supporting rod I? adjacent the divergence of the members II and I l. The valve I5 is of a length to abut the adjacent walls of members l0 and II alternately according to its position of adjustment, while valve I6 is stopped by engagement with the wall of tube II at its intersection with tube ll. The valves I5 and iii are adapted to be controlled in any desired manner, and the arrangement of the springs is such that one of said valves may continue to move after the other is seated against its associated stop until the desired operative position of both valves is achieved. It will thus be seen that with the valves l5 and I6 in the position shown in ,full lines in Fig, ha r from air scoop in. is diverted .intopassagei4.,.-;this in turn creating a suction in tube I I, thus exhausting used air from the vehicle. Conversely, with the valves [5 and It in the position shown in dotted lines, it will be seen that the exhaust tube I4 is closed, and that fresh air is passed inwardly through the tube l I into the interior of the vehicle, and that thus the tube ll serves both as an inlet and an exhaust, when desired.

Referring now to Fig. 2, there is disclosed at Illa an air scoop similar to air scoop l0, communicating with tube I la having therein a valve 12a operated by a control rod l3a in a manner similar to the previous modification. An outlet I40 is also provided to be described more fully hereinafter, while valves l5a and IEa mounted upon a suitable control rod Ila, operate in substantially the identical manner previously described.

Referring back now to the outlet [4a, at its lower extremity there is provided a tube 20 open at both ends and outwardly flared at both ends,

as at 2| and 22, to provide a Venturi effect. The tube 20 is adapted to be positioned adjacent a fan 23 rotated in any desired manner by the motor, which fan may be the conventional engine fan or alternatively a small supplemental fan driven in any required manner. In this construction, it will be seen that with the valves Wu and lBa in the dotted line position, air is drawn into the vehicle, and similarly drawn out with the valves in the full line position as in the previous modification, so long as the vehicle is in motion. However, when the vehicle is stopped, a substantial suction may be effected by the passage of air from the fan 23 through the tube 20, thus effecting an exhaust of used air from the vehicle regardless of whether the same is in motion or not.

From the foregoing, it will now be seen that there is herein provided an improved and simplified ventilating system for motor vehicles utilizing a single conduit or tube for both inlet and exhaust purposes selectively as may be desired.

As many embodiments may be made of this inventive concept, and as many modifications may be made in the embodiment hereinbefore shown and described, it is to be understood that all matter herein is to be interpreted merely as illustrative and not in a limiting sense.

I claim:

1. In a ventilating system for motor vehicles, the combination of an air scoop, a duct leading therefrom into the interior of the vehicle, a suction duct leading therefrom to the exterior of the vehicle, valve means for selectively opening and closing said first duct relative to said scoop, and second separately movable valve means for opening said first duct to said suction duct when said first duct is closed to said scoop.

2. In a ventilating system for motor vehicles, the combination of an air scoop, a duct leading therefrom into the interior of the vehicle, a suction duct leading therefrom to the exterior of the vehicle, valve means for selectively opening and closing said first duct relative to said scoop, and second separately movable valve means for opening said first duct to said suction duct when said first duct is closed to said scoop, said second valve means closing the communication between said first duct and said suction duct when said first duct is open.

3. In a ventilating system for motor vehicles, the combination of an air scoop, a duct leading therefrom into the interior of the vehicle, a suction duct leading therefrom to the exterior of the vehicle, valve means for selectively opening 4 and closing said first duet relative to said scoop, second separately movable valve means for opening said first duct to said suction duct when said first duct is closed to said scoop, said second valve means closing the communication between said first duct and said suction duct when said first duct is open, and a second air scoop communieating with said suction duct only.

References Cited in the file of this patent UNITED STATES PATENTS Number Name Date 1,617,939 Burt Feb. 15, 1927 1,787,561 Askam Jan. 6, 1931 1,956,123 Givens Apr. 24, 1934 2,084,787 Zaustinsky June 22, 1937 2,577,836 Willson Dec. 11, 1951 FOREIGN PATENTS Number Country Date 149,596 Switzerland Nov. 16, 1931 

